Tutorials Posted by PhDforU
PhDforU from Purdue University
PhDforU's Posted Tutorials
| Bounty | Category | Question | Tutorial | Purchases | Date Posted |
|---|---|---|---|---|---|
| $8.00 | Mathematics | Use calculus to find the points along th | Solution with insight
...s point D. 6. The point D is located at: ( (x1+x2)/2, (y1+y2)/2 ), where the two extreme points of B are: (x1, y1) and (x2, y2). We know x1=3, y1=1, x2=6, y2=6. 7. Therefore D is at (9/2,7/2). 8. The...... | Jul 19, 2009 at 6:30:19PM | |
| $3.00 | Physics | One evening a husband and wife are worki | Solution with insight
...behind the end, or anywhere even behind that, is "unaware" that the nozzle has been partially closed up ahead. Thereby, we can conclude that water keeps flowing at the same vo... | Jun 28, 2009 at 3:49:34PM | |
| $9.01 | Foreign-Languages | Question for PhDforU only | Solution with insight
... more than $100. Therefore the statement "...and ... | Jun. 18, 2009 at 10:49:43AM | |
| $1.00 | Mathematics | Zane can paint a room in 5 hours. Terry | solution with insight
...ng together, in hour they would paint 1/5 + 1/6 = 11/30th of the room. Then, in x hours the fraction of the room they paint is 11x/30 Let x hours be the time they take to paint the whole r... | Jun. 09, 2009 at 12:09:40AM | |
| $40.00 | Mathematics | Algebra Questions | all solutions with reasons. see comments on my other solutions!
...he comments in t... | May 28, 2009 at 5:23:34PM | |
| $3.00 | Computer-Science | fix code | solution with insight
...m faced by beginners. It can be ... | May. 24, 2009 at 10:23:27AM | |
| $5.00 | Physics | Physics Question | solution with FBD (all steps detailed)
... force, W-weight of box, Fy-applied force, R-Fy-W=0 => R=Fy+W=881.7N Step 4: Calculate Frictio... | May 21, 2009 at 10:45:11PM | |
| $2.00 | Mathematics | Help me with conics in trig. I need to f | solution with color graph (generated in MATLAB)
...th focus at (0,b), vertex at (0,a) and center at (0,0) is given by: (y/a)... | May 21, 2009 at 10:01:34PM | |
| $1.00 | Physics | Physics and Chemistry | mechanics, elec and magnetism
...artially with Chemistry. I have scientific publications in mechanics, so you can relax completely when I say I can help. Let me kn... | May. 14, 2009 at 09:25:36AM | |
| $7.00 | Mathematics | A 20-lb. monkey is attached to a 50-ft. | solution with insight (the elegant one)
...t the beginning: Monkey on ground -> P(monkey) = weight of monkey * height = 20*g*0 = 0 Chain suspended -> P(chain) = weight of suspended length * height of center of gravity of suspended len... | May 08, 2009 at 8:34:00PM | |
| $15.00 | Mathematics | logic12 | Solution with color figure
...s all steps neatly ente... | May. 07, 2009 at 02:59:37AM | |
| $7.00 | Mathematics | logic11 | Solution
... PDF file... | May. 07, 2009 at 01:10:44AM | |
| $20.00 | Mathematics | Linear Algebra today | solution with insight, all steps detailed
...orrect answers. Please ... | May. 05, 2009 at 02:13:54AM | |
| $4.00 | Mathematics | logic5 | solution with insight, all steps detailed
...),(8,b)} Solution to part (a) We check in every R-set, that all elements of type (x,y) are such that x is in A, and y is in B. 1. R1 does not satisfy: 3rd element is (d,6) and d is NOT in A. So R1 is...... | May. 03, 2009 at 09:25:05AM | |
| $3.00 | Mathematics | logic3 | solution with insight, every step detailed
...4-choose-3 = 4 (c) Experiment: pick 3 balls out of 11. Sample space: any 3 balls = 11-choose-3 = 165... | May 02, 2009 at 7:10:18PM | |
| $3.00 | Mathematics | Logic6 | solution with insight, every step detailed
...ot have citizenship of this country. I perhaps could, if I met some other conditions. Similarly in (d), the beach might erode even if there is no storm. So here are the solutions: (a)... | May 02, 2009 at 6:55:03PM | |
| $1.00 | Mathematics | logic1 | step-by-step explanation
...2. Sample space (possible outcomes) of faces that are up # Coin 1 Coin 2 -----------------... | May 02, 2009 at 6:40:53PM | |
| $0.50 | Mathematics | if i want to share 63.75 equally among 3 | Solution
... (=63.7... | May 01, 2009 at 7:37:13PM | |
| $2.00 | Mathematics | Logic -Discrete mathematics | solution with insight, every step detailed
... attaching the solution. Is... | May 01, 2009 at 5:05:10PM | |
| $2.00 | Mathematics | Proof | solution with insight, every step detailed
...ps, neatly... | May 01, 2009 at 4:50:34PM | |
| $2.00 | Mathematics | Antiderivatives | step-by-step solution
...0 + 2*0 + D => D = 1 6. Substitute back into 4: f(x) = (3/2)x^2 - (7/6)x^3 - (9/5)x^5 + 2x + 1 --------------------------------------------------- (b) 1. Integrate once, let C be constant of...... | Apr 30, 2009 at 9:41:07PM | |
| $3.00 | Mathematics | Calculus | solution with insight
...ached the solu... | Apr 30, 2009 at 9:21:14PM | |
| $1.00 | Mathematics | finite 1-35 | solution with insight
...he demand for them be q (in numbers of pills). A linear equation would be of the form: D(q) = aq + b where a, b are constants. We need to fi... | Apr 25, 2009 at 7:23:04PM | |
| $1.00 | Mathematics | finite math 11 | solution with insight
...Gauss Jor... | Apr 25, 2009 at 7:07:37PM | |
| $2.00 | Mathematics | finite math 53 | solution with insight
...ons needed her... | Apr 25, 2009 at 6:37:26PM | |
| $20.00 | Mathematics | help from jotag1714 only | solution with insight
... feel like some game. The thumb rules for making it look like a game is 1) more algebraic operations the better. arriving at x after multiplying by 2 and then dividing by 2 again isn\'t cool enough....... | Apr 22, 2009 at 5:35:51PM | |
| $1.00 | Mathematics | help from jotag1714 only | the crux of the matter
... manipulations, and that in the end, feel like some smart ga... | Apr 22, 2009 at 5:08:11PM | |
| $10.00 | Physics | I'm trying to calculate the moment of in | solution with insight
...>1. the concept... | Apr 21, 2009 at 8:34:25PM | |
| $0.50 | Mathematics | Calculus | solution with insight
... a_n of our series S with which we compare the given series. So the question is: Does S = SIGMA 1/(n^3) converge? Yes it does. In fact, th... | Apr 21, 2009 at 5:17:04PM | |
| $1.00 | Mathematics | Calculus | solution with insight
... find some series S - using our vast ;) knowledge of them - which either: a) converges, and each term of S is larger than each corresponding term of the given series, OR b) diverges, and each term of...... | Apr 21, 2009 at 3:16:59PM | |
| $1.50 | Physics | optics Q ...HELP | Solution with insight
...ched. The first figure considers the convex lens L2. We know that the lens will refract a parallel beam to it right (rays in red), if the light source were placed at its left focal point (... | Apr 19, 2009 at 4:14:54PM | |
| $2.00 | Physics | a convex mirror with 80.0cm has a 5.00cm | Solution with insight
...ed at I, at a distance x from A. Givens: X=45, H=5, f=40 or 80 (see REMARK at the end of this tutorial). To find: x, h. Equations: 1. (1/x) = (1/X) + (1/f) 2. (h/H) = (x/X) Case A: If focal leng... | Apr 19, 2009 at 3:25:06PM | |
| $6.00 | Mathematics | Please help me understand this calculus problem. | solution with insight
...that is done, one can use symmetry to find all the four solutions at once. It is obvious that if (a,b) a>0, b>0 is a point of intersection then (-a,b), (-a,-b) and (a,-b) are also solutions. Equation...... | Apr. 19, 2009 at 11:38:08AM | |
| $5.00 | Mathematics | Please help me understand this calculus problem. | solution with insight
...uence is nothing but a geometric progression with a ratio smaller than 1. It converges accord... | Apr. 19, 2009 at 02:32:53AM | |
| $10.00 | Mathematics | Please help me understand this calculus question. | solution with insight
... color figures det... | Apr. 19, 2009 at 12:07:06AM | |
| $5.00 | Mathematics | Please help me understand this calculus question. | solution with insight
...ution attac... | Apr 18, 2009 at 11:11:34PM | |
| $8.00 | Mathematics | Please help me understand this calculus question. | solution with insight
...on, with all steps detailed. A graphical... | Apr 18, 2009 at 10:43:49PM | |
| $1.00 | Physics | Velocity/Speed | Solution with insight
... principle applied: Newton's first law of motion. "In the absence of an external force, the momentum of a system remains constant." b) The momentum is given by the product of mass and velocity. c) If...... | Apr 11, 2009 at 11:45:52PM | |
| $6.00 | Mathematics | analytical | Solution with insight
...color figure for ease in visualizing. The steps includ... | Apr 11, 2009 at 11:15:48PM | |
| $1.50 | Mathematics | I understand one rule don't have a clue on the other | Solution with insight
...i+1)^4) (Recall area of trapezoid = average length of parallel sides X distance between parallel sides) Total area is sum of At(i), i going from 0 to 9, which is Intergral_from_trapezoid_rule = 0.5 *...... | Apr 11, 2009 at 9:04:33PM |